Bosch SM25/50-TA | Permanent Magnet Synchronous Motor

Parameter Name Parameter Value
​Product Model ​Bosch Rexroth SM25/50-TA
​Manufacturer Bosch Rexroth AG
​Product Type Permanent Magnet Synchronous Motor
​Nominal Torque ​50 Nm (S1 duty at 1500 rpm)
​Peak Torque ​150 Nm (300% overload, 1 min)
​Nominal Speed 3000 rpm
​Max Speed 6000 rpm
​Rotor Inertia 0.012 kg·m²
​Voltage Rating 400 V AC (±10%)
​Feedback System Hiperface DSL® absolute encoder (20-bit)
​Thermal Sensor KTY84-130 (-TA suffix)
​Frame Size 240 mm (Flange 25)
​Protection Class IP65 (IP54 at connectors)
​Cooling Method Natural convection (IC410)
​Pole Pairs 6
​Ambient Temperature 0°C to +50°C (derated to +70°C)
​Weight 36 kg
Add to quote
Categories: ,

Description

Bosch Rexroth IndraDyn S SM25/50-TA Synchronous Servo Motor Specification

Product Overview

The ​Bosch Rexroth SM25/50-TA is a high-dynamics synchronous servo motor designed for precision automation in space-constrained industrial systems. As part of Bosch Rexroth’s flagship ​IndraDyn S series, this compact yet powerful motor delivers 50 Nm nominal torque at 240 mm flange size, making it ideal for robotics, packaging, and machine tool axes. The ​Bosch Rexroth SM25/50-TA features integrated temperature monitoring and Hiperface DSL® absolute encoder technology for maintenance-free operation in continuous production. Its optimized torque-to-inertia ratio enables rapid acceleration/deceleration cycles (<50 ms settling times) while IP65 protection sustains reliable performance in dusty or washdown environments.

Technical Specifications

Parameter Name Parameter Value
​Product Model ​Bosch Rexroth SM25/50-TA
​Manufacturer Bosch Rexroth AG
​Product Type Permanent Magnet Synchronous Motor
​Nominal Torque ​50 Nm (S1 duty at 1500 rpm)
​Peak Torque ​150 Nm (300% overload, 1 min)
​Nominal Speed 3000 rpm
​Max Speed 6000 rpm
​Rotor Inertia 0.012 kg·m²
​Voltage Rating 400 V AC (±10%)
​Feedback System Hiperface DSL® absolute encoder (20-bit)
​Thermal Sensor KTY84-130 (-TA suffix)
​Frame Size 240 mm (Flange 25)
​Protection Class IP65 (IP54 at connectors)
​Cooling Method Natural convection (IC410)
​Pole Pairs 6
​Ambient Temperature 0°C to +50°C (derated to +70°C)
​Weight 36 kg

Key Functional Capabilities

Dynamic Motion Performance:
High pole count (6 pole pairs) enables rapid torque response ≤1 ms for pick-and-place operations. Optimized rotor inertia achieves 50 rad/s² acceleration in robotic wrist applications. Sensorless load detection identifies collisions without additional hardware.

Integrated Condition Monitoring:
The ​**-TA** suffix denotes KTY84 temperature sensors that stream real-time winding heat data to Rexroth ​IndraDrive controllers. Hiperface DSL® diagnostics track:

  • Bearing vibration signatures
  • Commutation angle deviations
  • Predictive maintenance intervals

Bosch SM35/70-T

Compact Installation Design:
Flange dimension 240×240 mm fits ISO 9409-1 standard mounts. Single-cable solution (DRIVE-CLiQ® or MSD-HD23) integrates power, feedback, and thermals. Optional ​**-IB** brake variant adds 40 Nm holding torque for vertical axes.

Industry 4.0 Connectivity:
Hiperface DSL® outputs OPC UA formatted data via ​Rexroth IoT Gateway. Pre-configured ​MTx micro interface enables plug-and-play commissioning with IndraWorks engineering software.

Targeted Application Domains

Collaborative Robotics:

  • 6-axis cobot joint motors (≤3 kg payload) requiring compactness and overload tolerance
  • Force-limited applications with ISO 13849 PLd safety compliance

Pharma Packaging Lines:

  • High-speed vial capping with CIP washdown compatibility (IP65)
  • Torque-synchronized conveyor indexing ±0.05°

CNC Machine Tools:

  • Tool changer rotary axes needing 6000 rpm operation
  • 4th/5th axis positioning with ≤2 arc-sec repeatability

Semiconductor Handling:

  • Wafer robot Z-axis drives (low particle generation design)
  • Cleanroom-compatible lubrication (ISO Class 3)

Electric Mobility:

  • Battery module test bench dynamometers
  • EV gearbox assembly torque verification

Complementary System Components

Product Assurance Commitment

Bosch Rexroth guarantees 36-month performance warranty with 60,000-hour design life. Each ​Bosch Rexroth SM25/50-TA undergoes:

  • Dynamic balance to G2.5 per ISO 1940-1
  • Hiperface DSL® auto-calibration (≤0.05° electrical error)
  • 24-hour thermal shock cycling (-30°C to +110°C)
  • IP65 validation with 14.5 PSI water jets
    Global support provides:
  • 48-hour express replacement for critical failures
  • Free IndraWorks firmware updates for efficiency optimization
  • SIL 3/PL e documentation packages
  • Vibration analysis training through Rexroth Academy
  • 10-year spare parts availability guarantee

Critical Application Notes:

  • Derate torque 1%/°C above 40°C ambient
  • Requires ≥400 V AC ±10% supply voltage
  • Maintain <0.05° angular shaft alignment
  • For vertical mounting: Specify ​**-IB** brake option
  • Hiperface DSL® cable length ≤50 m without termination

Related products